WordPress清理无用自定义字段

WordPress清理无用自定义字段

# show the orphan postmeta
SELECT * FROM tableprefix_postmeta pm LEFT JOIN tableprefix_posts wp ON wp.ID = pm.post_id WHERE wp.ID IS NULL;
# remove the orphan postmeta
DELETE pm FROM tableprefix_postmeta pm LEFT JOIN tableprefix_posts wp ON wp.ID = pm.post_id WHERE wp.ID IS NULL;

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